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pi(1) [bsd man page]

PI(1)							      General Commands Manual							     PI(1)

NAME
pi - Pascal interpreter code translator SYNOPSIS
pi [ -blnpstuwz ] [ -i name ... ] name.p DESCRIPTION
Pi translates the program in the file name.p leaving interpreter code in the file obj in the current directory. The interpreter code can be executed using px. Pix performs the functions of pi and px for `load and go' Pascal. The following flags are interpreted by pi; the associated options can also be controlled in comments within the program as described in the Berkeley Pascal User's Manual. -b Block buffer the file output. -i Enable the listing for any specified procedures and functions and while processing any specified include files. -l Make a program listing during translation. -n Begin each listed include file on a new page with a banner line. -p Suppress the post-mortem control flow backtrace if an error occurs; suppress statement limit counting. -s Accept standard Pascal only; non-standard constructs cause warning diagnostics. -t Suppress runtime tests of subrange variables and treat assert statements as comments. -u Card image mode; only the first 72 characters of input lines are used. -w Suppress warning diagnostics. -z Allow execution profiling with pxp by generating statement counters, and arranging for the creation of the profile data file pmon.out when the resulting object is executed. FILES
file.p input file file.i include file(s) /usr/share/pascal/pi_stringstext of the error messages /usr/share/pascal/how_pi*basic usage explanation obj interpreter code output SEE ALSO
Berkeley Pascal User's Manual pcc(1), pix(1), px(1), pxp(1), pxref(1) DIAGNOSTICS
For a basic explanation do pi In the diagnostic output of the translator, lines containing syntax errors are listed with a flag indicating the point of error. Diagnos- tic messages indicate the action which the recovery mechanism took in order to be able to continue parsing. Some diagnostics indicate only that the input is `malformed.' This occurs if the recovery can find no simple correction to make the input syntactically valid. Semantic error diagnostics indicate a line in the source text near the point of error. Some errors evoke more than one diagnostic to help pinpoint the error; the follow-up messages begin with an ellipsis `...'. The first character of each error message indicates its class: EFatal error; no code will be generated. eNon-fatal error. wWarning - a potential problem. sNon-standard Pascal construct warning. If a severe error occurs which inhibits further processing, the translator will give a diagnostic and then `QUIT'. AUTHORS
Charles B. Haley, William N. Joy, and Ken Thompson BUGS
Formal parameters which are procedures and functions are not supported. The keyword packed and the function dispose are recognized but have no effect. For clarity, semantic errors should be flagged at an appropriate place in the source text, and multiple instances of the `same' semantic error should be summarized at the end of a procedure or function rather than evoking many diagnostics. When include files are present, diagnostics relating to the last procedure in one file may appear after the beginning of the listing of the next. 3rd Berkeley Distribution PI(1)

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PX(1)							      General Commands Manual							     PX(1)

NAME
px - Pascal interpreter SYNOPSIS
px [ obj [ argument ... ] ] DESCRIPTION
Px interprets the abstract machine code generated by pi. The first argument is the file to be interpreted, and defaults to obj; remaining arguments are available to the Pascal program using the built-ins argv and argc. Px is also invoked by pix when running `load and go'. If the program terminates abnormally an error message and a control flow backtrace are printed. The number of statements executed and total execution time are printed after normal termination. The p option of pi suppresses all of this except the message indicating the cause of abnormal termination. FILES
obj default object file pmon.out profile data file SEE ALSO
Berkeley Pascal User's Manual pi(1), pix(1) DIAGNOSTICS
Most run-time error messages are self-explanatory. Some of the more unusual ones are: Reference to an inactive file A file other than input or output was used before a call to reset or rewrite. Statement count limit exceeded The limit of 500,000 executed statements (which prevents excessive looping or recursion) has been exceeded. Bad data found on integer read Bad data found on real read Usually, non-numeric input was found for a number. For reals, Pascal requires digits before and after the decimal point so that num- bers like `.1' or `21.' evoke the second diagnostic. panic: Some message Indicates a internal inconsistency detected in px probably due to a Pascal system bug. Charles B. Haley, William N. Joy, and Ken Thompson BUGS
Calls to the procedures dispose and linelimit are ignored. Post-mortem traceback is not limited; infinite recursion leads to almost infinite traceback. Because interrupts sometimes find the system in the middle of a procedure or function entry or exit, the error backtrace on an interrupt is occasionally meaningless. The current line is, however, always correct; only the call backtrace and the name of the current routine may be lost. 3rd Berkeley Distribution PX(1)

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